package com.kylin.syn;

//不安全的取钱
//两个人去银行取钱，账户
public class UnsafeBank {

    public static void main(String[] args) {
        Account account = new Account(100, "积蓄");
        Drawing you = new Drawing(account, 50, "你");

        Drawing girlFriend = new Drawing(account, 100, "女朋友");

        you.start();
        girlFriend.start();

    }
}

//账户
class Account {
    int money;//余额
    String name;//卡名

    public Account(int money, String name) {
        this.money = money;
        this.name = name;
    }
}

//银行:模拟取款
class Drawing extends Thread {
    Account account;//账户
    //取了多少钱
    int drawingMoney;
    //现在手里有多少钱
    int nowMoney;

    public Drawing(Account account, int drawingMoney, String name) {
        super(name);
        this.account = account;
        this.drawingMoney = drawingMoney;
    }

    //取钱
    @Override
    public synchronized void run() {
        if (account.money<=0){
            return;
        }
        synchronized (account) {
            if (account.money - drawingMoney < 0) {
                System.out.println(Thread.currentThread().getName() + "钱不够，取不了");
                return;
            }

            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            //卡内余额 = 余额 - 你取的钱
            account.money = account.money - drawingMoney;
            //你手里的钱
            nowMoney = nowMoney + drawingMoney;

            System.out.println(account.name + "余额为：" + account.money);
            // Thread.currentThread().getName() = this.name 继承了thread
            System.out.println(this.getName() + "手里的钱：" + nowMoney);
        }
    }
}
